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XROOTD-L  December 2020

XROOTD-L December 2020

Subject:

HTTP configuration with VOMS authentication

From:

Yvan Calas <[log in to unmask]>

Reply-To:

Support use of xrootd by HEP experiments <[log in to unmask]>

Date:

Tue, 8 Dec 2020 09:25:47 +0100

Content-Type:

multipart/signed

Parts/Attachments:

Parts/Attachments

text/plain (99 lines) , smime.p7s (99 lines)

Hi,

I am a bit puzzled concerning the configuration of my XRootD server running v4.11.2-1 when I try to enable http with voms authentication. The following packages are installed:

xrootd-4.11.2-1.el7.x86_64
xrootd-client-4.11.2-1.el7.x86_64
xrootd-client-libs-4.11.2-1.el7.x86_64
xrootd-libs-4.11.2-1.el7.x86_64
xrootd-selinux-4.11.2-1.el7.noarch
xrootd-server-4.11.2-1.el7.x86_64
xrootd-server-libs-4.11.2-1.el7.x86_64
voms-2.0.15-1.el7.x86_64
voms-clients-cpp-2.0.15-1.el7.x86_64
vomsxrd-0.3.0-1.el7.cern.x86_64
xrdhttpvoms-0.2.5-2.el7.x86_64

and I have the following configuration files: 

=================================================
$ cat xrootd_server_grid.cfg
xrd.port 1094
xrd.protocol xrootd *
[...]

all.export /xrootd/in2p3.fr/disk/juno nolock r/w

if exec xrootd
  xrd.protocol http:1094 /usr/lib64/libXrdHttp.so
  http.exthandler xrdtpc /usr/lib64/libXrdHttpTPC.so
  http.secxtractor /usr/lib64/libXrdHttpVOMS.so
  http.header2cgi Authorization authz
  http.cadir /etc/grid-security/certificates
  http.cert /etc/grid-security/xrd/xrdcert.pem
  http.key /etc/grid-security/xrd/xrdkey.pem
  http.listingdeny yes
  http.trace all
fi

ofs.tpc fcreds gsi =X509_USER_PROXY ttl 60 70 xfr 20 autorm pgm /usr/share/xrootd/utils/xrdcp-tpc.sh
xrootd.chksum adler32 /usr/share/xrootd/utils/xrdadler32-tpc.sh

xrootd.seclib /usr/lib64/libXrdSec.so
sec.protparm gsi -vomsfun:/usr/lib64/libXrdSecgsiVOMS-4.so -vomsfunparms:certfmt=pem|vos=juno|grps=/juno|grpopt=10|dbg
sec.protocol /usr/lib64 gsi -dlgpxy:1 -exppxy:=creds -ca:1 -crl:3 -gridmap:/dev/null
acc.audit deny
acc.authdb /etc/xrootd/auth_file
acc.authrefresh 60
ofs.authorize
[...]

$ cat auth_file
g /juno /xrootd/in2p3.fr/disk/juno rwild /xrootd/in2p3.fr/tape/juno rwild
=================================================

With my Juno proxy, I am able to read a file using xrdcp. However, using gfal-copy with the http protocol, it fails with: 

$ gfal-copy http://ccxrdli284.in2p3.fr:1094//xrootd/in2p3.fr/disk/juno/user/y/ycalas/testfile_dir/testfile_IN2P3-XROOTD.txt ti)

gfal-copy error: 1 (Operation not permitted) - Could not stat the source: HTTP 403 : Permission refused


It seems that the mapping is not done correctly (login as "nobody" user) as shown below. I wonder what is the tricky part to modify in my XRootD configuration file... 

=================================================
201207 21:42:49 190911 ?:27@[xxx.xxx.xxx.xxx] sysXrdHttp: received dlen: 16
201207 21:42:49 190911 ?:27@[xxx.xxx.xxx.xxx] sysXrdHttp: received dump: 72 69 65 68 32 47 47 120 114 111 111 116 100 47 105 00
201207 21:42:49 190911 ?:27@[xxx.xxx.xxx.xxx] sysXrdHttp: Protocol matched. https: 0
201207 21:42:49 190911 ?:27@[xxx.xxx.xxx.xxx] sysXrdHttp:  Process. lp:0x7fdfe80010d8 reqstate: 0
201207 21:42:49 190911 ?:27@[xxx.xxx.xxx.xxx] sysXrdHttp:  Setting host: [xxx.xxx.xxx.xxx]
201207 21:42:49 190911 sysXrdHttp: getDataOneShot BuffAvailable: 1048576 maxread: 1048576
201207 21:42:49 190911 sysXrdHttp: read 237 of 1048576 bytes
201207 21:42:49 190911 sysXrdHttp:  rc:96 got hdr line: HEAD //xrootd/in2p3.fr/disk/juno/user/y/ycalas/testfile_dir/testfile_IN2P3-XROOTD.txt HTTP/1.1
201207 21:42:49 190911 sysXrdHttp:  Parsing first line: HEAD //xrootd/in2p3.fr/disk/juno/user/y/ycalas/testfile_dir/testfile_IN2P3-XROOTD.txt HTTP/1.1
201207 21:42:49 190911 sysXrdHttp:  rc:55 got hdr line: User-Agent: gfal2-util/1.5.3 gfal2/2.18.1 neon/0.0.29
201207 21:42:49 190911 sysXrdHttp:  rc:14 got hdr line: Keep-Alive:
201207 21:42:49 190911 sysXrdHttp:  rc:24 got hdr line: Connection: Keep-Alive
201207 21:42:49 190911 sysXrdHttp:  rc:14 got hdr line: TE: trailers
201207 21:42:49 190911 sysXrdHttp:  rc:32 got hdr line: Host: yyyyyy.zzzz.fr:1094
201207 21:42:49 190911 sysXrdHttp:  rc:2 got hdr line:
01207 21:42:49 190911 sysXrdHttp:  rc:2 detected header end.
201207 21:42:49 190911 XrootdBridge: unknown.7:27@[xxx.xxx.xxx.xxx] login as nobody
201207 21:42:49 190911 unknown.7:27@[xxx.xxx.xxx.xxx] sysXrdHttp:  Process. lp:0x7fdfe80010d8 reqstate: 0
201207 21:42:49 190911 unknown.7:27@[xxx.xxx.xxx.xxx] sysXrdHttp: Process is exiting rc:0
201207 21:42:49 190911 acc_Audit: http deny  *@[xxx.xxx.xxx.xxx] stat /xrootd/in2p3.fr/disk/juno/user/y/ycalas/testfile_dir/testfile_IN2P3-XROOTD.txt
201207 21:42:49 190911 ofs_stat: unknown.7:27@[xxx.xxx.xxx.xxx] Unable to locate /xrootd/in2p3.fr/disk/juno/user/y/ycalas/testfile_dir/testfile_IN2P3-XROOTD.txt; permission denied
=================================================

Any idea? 

Thanks,

Yvan
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